Preparation method of manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent

A double-shell, calcium carbonate technology, applied in separation methods, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of calcium-based adsorbents such as easy sintering and rapid deactivation, and achieve excellent adsorption Performance stability, improved adsorption performance, and uniform particle size

Active Publication Date: 2019-07-02
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a manganese-doped double-shell calcium carbonate hollow microsphere CO 2 The preparation method of adsorbent

Method used

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  • Preparation method of manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent
  • Preparation method of manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent
  • Preparation method of manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of carbon sphere template: put the aqueous solution of sucrose with a concentration of 1M into the crystallization kettle, carry out the hydrothermal crystallization reaction at 200°C for 120min, and suction filter the obtained product after the crystallization is completed. The obtained filter cake was alternately washed with ethanol and water, and the obtained product was dried at 80° C. for 12 hours, and then ground, and the obtained carbon spheres had a diameter of 2 μm.

[0029] (2) Get 20ml of absolute ethanol and 10ml of deionized water to obtain a mixed solvent, and 14.169g of Ca(NO 3 ) 2 4H 2 O and 0.588g of Mn(CH 3 COO) 2 4H 2 O (that is, the concentration of calcium ions is 2mol / L, the molar ratio of calcium and manganese ions fed into the feed is 25 / 1, and finally the molar ratio of calcium and manganese ions actually measured in the adsorbent is 12 / 1) is added to the above solvent to obtain a metal salt solution A. Add 600 mg of the car...

Embodiment 2

[0032] (1) Preparation of carbon sphere template: put the aqueous solution of sucrose with a concentration of 1M into the crystallization kettle, carry out the hydrothermal crystallization reaction at 200°C for 110min, and suction filter the obtained product after the crystallization is completed, and filter the obtained filter cake Alternately washing with ethanol and water several times, followed by drying at 80 °C for 12 h, and grinding, the obtained carbon spheres have a diameter of 1 μm.

[0033] (2) Get 20ml of absolute ethanol and 10ml of deionized water to obtain a mixed solvent, and 14.169g of Ca(NO 3 ) 2 4H 2 O and 0.588g of Mn(CH 3 COO) 2 4H 2 O (that is, the concentration of calcium ions is 2mol / L, the molar ratio of calcium and manganese ions fed into the feed is 25 / 1, and finally the molar ratio of calcium and manganese ions actually measured in the adsorbent is 12 / 1) is added to the above solvent to obtain a metal salt solution A. Add 600 mg of the carbon s...

Embodiment 3

[0036] (1) Preparation of carbon sphere template: put an aqueous solution of sucrose with a concentration of 1M into a crystallization kettle, carry out a hydrothermal crystallization reaction at 200°C for 120min, and suction filter the obtained product after the crystallization is completed, and filter the obtained filter cake Alternately washing with ethanol and water for several times, followed by drying at 80 °C for 12 h, and grinding, the obtained carbon spheres have a diameter of 2 μm.

[0037] (2) Get 30ml of deionized water to obtain a mixed solvent, and 14.169g of Ca(NO 3 ) 2 4H 2 O and 0.588g of Mn(CH 3 COO) 2 4H 2 O (that is, the concentration of calcium ions is 2mol / L, the molar ratio of calcium and manganese ions fed into the feed is 25 / 1, and finally the molar ratio of calcium and manganese ions actually measured in the adsorbent is 12 / 1) is added to the above solvent to obtain a metal salt solution A. Add 600 mg of the carbon sphere template prepared in 1) ...

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Abstract

The invention discloses a preparation method of a manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent. The preparation method comprises following steps: cane sugar solution hydro-thermal reaction is carried out to prepare carbon spheres; the carbon spheres are taken as a sacrificial template, and are added into a mixed solution of a calcium salt and a manganese salt, and then water bath processing, drying, and roasting are carried out so as to obtain the manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent. According to the preparation method, the calcium/manganese ratio, the carbon sphere template, and solvent composition are adjusted, so that accurate control on the shell layer thickness, microsphere size, and the calcium/manganese ratio in the manganese doped double-shell-layer calcium carbonate hollow microsphere can be realized, the prepared manganese doped double-shell-layer calcium carbonate hollow microsphere CO2 adsorbent is relatively high in adsorption capacity and stability in adsorption and desorption circulation; the highest initial adsorption capacity of the adsorbent with the best performance is 0.62g CO2/g adsorbent, and the adsorption capacity is still maintained to be 0.53g CO2/g adsorbent after 25 times of circulation.

Description

technical field [0001] The invention relates to a calcium oxide-based CO with special morphology doped with inert components 2 The preparation method of adsorbent belongs to CO 2 High-temperature capture and material preparation fields. Background technique [0002] In recent years, with the increasing use of fossil fuels by humans, their combustion produces a large amount of CO 2 . CO 2 As one of the main greenhouse gases, the environmental problems caused by the greenhouse effect have become more and more serious. Current CO produced by human activities 2 Most of them come from the flue gas in coal-fired power plants, and the calcium-based adsorbent can directly treat the CO in the flue gas due to its high operating temperature. 2 Capturing, without cooling the flue gas, can save energy, coupled with its large adsorption capacity, wide range of raw material sources, low cost and many other advantages, it has become one of the most promising carbon dioxide capture tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/0222B01J20/043B01J20/28021Y02C20/40
Inventor 王胜平李姗江涛徐志鸿马新宾赵玉军
Owner TIANJIN UNIV
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